Stella's mum, it does sound like PE is a real possibility. 135/90 is only borderline high, but it is worth keeping a close eye on since it is an increase for you. I am surprised that your ob isn't getting you back sooner seeing as you have protein in your urine aswell. He didn't send you for bloods to check your liver enzymes? I was having twice weekly ob checks and weekly blood tests from 32 weeks after my BP went up. By the time my protein went up my liver function was already impaired.
Maybe get your bp checked at a chemist again this week to make sure it hasn't gone up anymore. As the other ladies have said, you can't mess around with PE, it all happens VERY quickly. If you have headaches or swelling or visual disturbances or sharp upper abdominal pain you need to be seen immediately!